Neil McKay was giving evidence at the trial of David Scott, 33, who denies murdering Johnston, 26, by repeatedly discharge a firearm at the junction of Shields Road and Scotland Street, Glasgow, on November 15, 2016.

He told prosecutor Alex Prentice QC that three 9mm bullets were fired at Johnston as he sat in the drivers’ seat of his Audi RS4.

The forensic scientist told the jury the bullets could have been fired from a self-loading pistol, a carbine or a rifle.

McKay said: “Three shots were fired at the vehicle, two through the driver’s window and one into the door seal on the driver’s door.”